8GF2

Crystal structure of SARS-CoV-2 receptor binding domain in complex with antibodies eCR3022.20 and CC12.3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.0 of the entry. See complete history


Literature

Broadening a SARS-CoV-1-neutralizing antibody for potent SARS-CoV-2 neutralization through directed evolution.

Zhao, F.Yuan, M.Keating, C.Shaabani, N.Limbo, O.Joyce, C.Woehl, J.Barman, S.Burns, A.Tran, Q.Zhu, X.Ricciardi, M.Peng, L.Smith, J.Huang, D.Briney, B.Sok, D.Nemazee, D.Teijaro, J.R.Wilson, I.A.Burton, D.R.Jardine, J.G.

(2023) Sci Signal 16: eabk3516-eabk3516

  • DOI: https://doi.org/10.1126/scisignal.abk3516
  • Primary Citation of Related Structures:  
    8GF2

  • PubMed Abstract: 

    The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) underscores the need for strategies to rapidly develop neutralizing monoclonal antibodies that can function as prophylactic and therapeutic agents and to help guide vaccine design. Here, we demonstrate that engineering approaches can be used to refocus an existing antibody that neutralizes one virus but not a related virus. Through a rapid affinity maturation strategy, we engineered CR3022, a SARS-CoV-1-neutralizing antibody, to bind to the receptor binding domain of SARS-CoV-2 with >1000-fold increased affinity. The engineered CR3022 neutralized SARS-CoV-2 and provided prophylactic protection from viral challenge in a small animal model of SARS-CoV-2 infection. Deep sequencing throughout the engineering process paired with crystallographic analysis of engineered CR3022 elucidated the molecular mechanisms by which the antibody can accommodate sequence differences in the epitopes between SARS-CoV-1 and SARS-CoV-2. This workflow provides a blueprint for the rapid broadening of neutralization of an antibody from one virus to closely related but resistant viruses.


  • Organizational Affiliation

    Department of Immunology and Microbiology, Scripps Research Institute, La Jolla, CA 92037, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Spike protein S1A,
F [auth B]
231Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: S2
UniProt
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTC2 
Go to UniProtKB:  P0DTC2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTC2
Glycosylation
Glycosylation Sites: 1Go to GlyGen: P0DTC2-1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CC12.3 Fab heavy chainB [auth C],
G [auth E]
220Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
CC12.3 Fab light chainC [auth D],
H [auth F]
215Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
eCR3022.20 Fab heavy chainD [auth H],
I [auth X]
222Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
eCR3022.20 Fab light chainE [auth L],
J [auth Y]
221Homo sapiensMutation(s): 0 
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 6
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseK [auth G]2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
L [auth A]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 157.57α = 90
b = 161.22β = 90
c = 230.117γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI132317
Bill & Melinda Gates FoundationUnited StatesOPP1170236
Bill & Melinda Gates FoundationUnited StatesINV-004923

Revision History  (Full details and data files)

  • Version 1.0: 2023-08-23
    Type: Initial release